Material recovery device of ethylene production line

• Main Authors: ZHU JINBAO, XIE XUDONG, MA KAI, XIE XIAN, GONG QINYUE, JIA GUANGBIN, WANG JIPING
• Format: Patent
• Language: Chinese; English
• Published: 10.12.2014
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMBINED HEATING AND REFRIGERATION SYSTEMS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The utility model relates to a material recovery device of an ethylene production line and belongs to the technical field of emptying displacement during overhaul halt period of ethylene production devices. The material recovery device comprises a cracked gas compression device, a cold box (5), a demethanizing tower (6) and a deethanizing tower (8), wherein the cracked gas compression device is connected with an inlet of the cold box (5); a gas-phase material outlet of the cold box (5) is connected with a gas-phase material processing device; a liquid-phase material outlet of the cold box (5) is connected with the demethanizing tower (6); a liquid-phase material outlet of the demethanizing tower (6) is connected with the deethanizing tower (8). The material recovery device is characterized in that a high-pressure methane gas outlet of the demethanizing tower (6) is respectively communicated with inlets of a fuel gas system (14) and the cracked gas compression device by virtue of pipelines with valves. During